schlomie

I was able to get jdtls to work on FreeBSD with [Helix](https://helix-editor.com/) I just built it normally (skipping tests.) It built without issues, but running it did not work ......

There are three linux specific jars in `config_linux/config.ini`. Whether or not using the Linux config for FreeBSD fully works or not is to be determined. I haven't encountered anything wonky...

This does work already. The only UX improvement I would recommend is prompting the user for the masterkey (to recreate the config file) instead of accepting it on stdin -...